Bye bye Sporty!

Slamtail Suspension

New available at Thunderbike


These mega-cool rears, where the fender hugs the tire tightly, were previously only possible with an air ride. As with our Air Rides, the Slamtail allows the rear to be raised and lowered simply by pushing a button.
This newly developed shock absorber changes the ride height hydraulically, while the shock absorber retains its function without restriction.

You like to ride sportive and want a cool appearance?
Then this is your suspension system!

It can do the same as an Air Ride, but also brings better riding characteristics. With the Slamtail, the rear springs linearly and not progressively like a usual Air Ride. This is especially noticeable when you are a little faster on the road.

An Air Ride is a good choice for those who like to cruise in a relaxed manner. If you have a more sportive riding style and want to know what the machine can do, you will enjoy the even working suspension of our Slamtail.

So the Slamtail is a height-adjustable suspension combined with the positive features of a normal, conventional shock absorber.

How does it work? An electrically driven hydraulic pump provides the desired spring preload of a very specially shaped spring.


These are the facts:

Material: Precision machined from aircraft grade aluminum and steel alloys.

Mode of operation: Same as the Air Ride – just push a button.

Conversion: Carried out by us. The original shock absorber is disassembled into its components, its body (the actual damper) is reused, spring and adjustment mechanism are replaced, then the Slamtail is completed ready for installation.

Installation: You remove your shock absorber yourself – we rebuild it – you install it again.

Result: A uniform suspension with the possibility of lowering the rear down to the tire! What means fun for you.


With TÜV approval for Milwaukee-Eight Softails from 2018 with OEM swingarm and for Thunderbike 18″ fender, for FXDR 2018-20 with OEM swingarm or with Thunderbike 18″ steelfender or GP style and for our GP swingarm and with TB 21″ swingarm conversion.


Some of our Customs with Slamtail

Do you need more information?


Nico Schnepel

Customparts, Dealer Support

0049 2852 - 6777-30
Send an email


Roman Reiners

Customparts, Dealer Support

0049 2852 - 6777-30
Send an email


Julian Wolter

Sales, Financing, Rental, Custombikes

0049 2852 - 6777-41
Send an email


Thomas Emky

Custombikes Service Workshop

0049 2852 - 6777-56
Send an email

You can find Thunderbike Parts and original Harley-Davidson Parts  in our online shop.


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